Moving picture film reel



Jan. 18, 1938. J. M. GOLDBERG MOVING PICTURE FILM REEL Filed Dec. 4,1936 Patented Jan. 18, 1938 UNITED STATES PATENT OFFICE 2,105,530 MOVINGPICTURE FILM REEL Jacob M. Goldberg, Denver, 0010.

Application December 3 Claims.

This invention relates to improvements in reels and has reference inparticular to a reel of the type employed for moving picture films.

In U. S. Letters Patent 2,051,334 granted to me on August 18, 1936, afilm reel, constructed almost entirely from sheet metal formed by properdies is shown. The present invention is in the nature of an improvementin the structure of the reel disclosed and claimed in the patent aboveindentifled.

It is the object of this invention to produce a film reel of substantialconstruction that can be formed almost entirely of sheet metal, drawn tothe desired shape by dies.

Another object is to produce a' reel in which the hub, is positivelyheld from rotation in the reel and whose construction is such that itwill withstand the severest strains to which it may be subjected innormal operatiomwithoutbreaking loose from the reel or movingtransversely there- A further object is to produce a construction inwhich the 'hub is provided with a radial flange or plate secured to itin such a way that neither relative, rotary. longitudinal or wobblemovement can take place. I I

A still further object of this invention is to produce whose ends areengaged by the. edges of openings in hub portions of the side members,in such a way that it is braced against accidental displacement from itsperpendicular position and in which the hub portions serve to preventaxial displacement of the hub.

The above and other objects that may become apparent as this descriptionproceeds are attained by means of a construction and an arrangement ofparts that will now be described in detail, and reference for thispurpose will be had to the accompanying drawing in which the structurehas been illustrated and in which:

Figure l is a side elevation of the reel, to a reduced scale;

Figure 2 is a section taken on line 2-2, Fig. l. and shows the centerportion of the reel to a scale approximately twice that used in Fig. 1;

Figure 3 is a view, partly a plan and partly a section, taken on line3-3., Fig. 2;

Figure 4 is a side elevation of the hub member andthe anchor plate thatis attached to it;

Figure 5 is a fragmentary section showing a modified construction; and

Figure 6 shows a slight modification.

The reel comprises two side members 6 that are identical in size andshape. It is not essential a reel having a tubular elo'ngatedhub of theside members also.

4, 1936, Serial No. 114,171

that they shall be identical, but it is preferable because both can thenbe formed by a single die. The sides have offset circular, areas 1' thatare connected to them by substantially cylindrical walls 8. From Fig. 2it will be observed that the 5 center portions 1 are surrounded by beadsor ridges 9 which abut when the reel is assembled, in the manner shownin Fig. 2. The beads are not, however, essential to: this invention.

The offset areas or portions 1 are provided 10 with a plurality-of holesl0, six' being shown.- These holes are formed in a circular row by-thedies and alternate holes are punched out full size, while the others aredrawn so as to leave'a' cylindrical flange like that indicated by dottedlines in Fig. 2 and designated by numeral II. The tubular flanges are inthe nature of tubular rivets andare employed to hold the parts inassembled relation, as-will hereinafter be pointed out. The ofisetportions 1 may each have an integral hub portion l3, provided with acentral opening I4, surrounded by an inwardly directed flange l5, whosefunction will appear as the description proceeds. i

A metal plate 16 is positioned in the space betwen the opposed oradjacent surfaces of the offset portions land this plate is providedwith openings of the proper size to receive the tubular flanges H, whichin the assembled reel, are flanged outwardly in the manner common withtubular rivets andthe flanges I! serve to secure the sides and theplatel6 together as a unitary; assembly. The thickness of plate 16 is suchthat 1 it will fill the space between the offset portions when the heads9 are in contact, as shown in Fig. 2. If the construction illustrated inFig. 6 is employed, the thickness of the plate and the extent of theoffset must be so calculated that the distance between the innersurfaces of the sides will be 'suflicient to receive the fllm. It is 40evident that the plate l6, when the parts are assembled, will bepositively held against rotation, and when the plate is made from steel,it will impart great strength and rigidity to the center portion of thereel.

Plate 16 is provided with a central opening of any suitable shape,either round, polygonal or oblong and the center of this opening mustcoincide with the center of the cylindrical walls 8 and I3. The centeropening in plate IE is formed by dies in such a way as to leave a flange18 that engages the outer surface of an elongated tubular hub memberlQ,whose size and shape is such that it will fit the opening with a snugdriving fit. Since the flange I8 is formed by dies, the

employed, the ends aremade circular, as indicated at 20, wherebyshoulders 2| are formed against which the flanges I5 rest; this servesto v and provided with flanges of parts 1.

Plate l6 serves as an anchor for the hub member l9 and positively 22that are overlapped its axis perpendicular to the plane of plate 5, andthis action is further assisted by the action of the hub portions l3 andBa.

The sides 6 are provided with the usual openings 23 and havestrengthening ribs 24.

The circular surfaces 1, 1' and 1" are oifset to an extent that is toone half to one-half the thickness of plate before described.

Reels constructed in accordance with this inventioncan be formed fromsheet metal, with the exception of the hub member l9, and] it is alsopractical to form this from formed into a tube.

hub IS, the reel will cessfully resist forces as new is: t

1. A moving picture film reel comprising two by the edges Due to thefact that plate I6 is quite rigid and is firmly attached to thesubstantially identical circular side members, each having a centralcircular area, ofl'set from the of the plate, and means for eflfecting anon-rotatbetween the hub and plate.

JACOB M. GOLDBERG.

